Here is search logs of 650,000 AOL users. It's very interesting to view search history of particular person and analyze his personality. Let's do it together! Read more about AOL search database scandal or view research papers on web searching.
dead letter
The term ead letter has several usages, each deriving from the notion of mail that is no longer deliverable.
Trivia about dead letter
It's the term for mail the Postal Service can't deliver